Mimeograph hand printers



C. E. CARLSEN MIMEOGRAPH HAND PRINTERS Sept. 17, 1963 Filed s t. 10,1962 2 Sheets-Sheet l INVENTOR. Carl E. Corlsen ATTORNEY.

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MIMEOGRAPH HAND PRINTERS Filed Sept. 10, 1962 2 Sheets-Sheet 2 INVENTOR.Corl E.Corlsen ATTORNEY O O O O O O O O O O O O O O O O O O O 0 2 oooooo0000000 0 O O O O O O O O O 0 0 O O O OO O O O O O O O O O l I I i l l lI l o 0120 mw &

United States Patent ,0

4 Claims. (Cl. 101-125 This application is a substitute one for theapplication filed Mar. 1, 1961, under Ser. No. 92,716, and abandoned,for Mimeograph Hand Printer.

This invention relates to novel improvements in hand stamps formimeograph printing, the object of which is to make an inexpensive handstamp which in the performance of work will fully equalize the work doneby well known mimeographs.

Thus the present invention embodies all the features for circulating theink in the stamp, and at the same time forming the basis for a largerstamp, as described in my copending application Ser. No. 72,667, filedNovember 30, 1960.

In the construction of my invention one piece of suitable material isbent upon itself approximately at the center to form two semi-cylindersadapted to receive an ink pad therebetween.

While this is a distinctive feature of novelty, it may, however bepreferable to have said semi-cylinders made in two separate pieces orsegments, screws or posts are then used to hold the two parts togetherand they are arranged so as to accommodate the fastening of the stencilon one side of the stamp.

On the other side a piece of material, or clasp, on the printingsemi-cylinder is bent over the edge of the inner semi-cylinder andadapted to hold the two cylinders loosely together. This will at thesame time permit the printing cylinder to move freely, as an ink storagepad is expanding and contracting under pressure.

This stamp employs in its construction some radically new features, asit actually uses two semi-cylinders, or sections one of which isperforated; it also uses two pads, one of which is of absorbentmaterial, such as, for instance, felt, and is used for ink storage andplaced between the semi-cylinders; the second pad is an ordinarymimeograph ink pad attached to the printing semi-cylinder upon which theactual stencil rests.

This stamp referred to above will be explained in detail hereinafter, asit comprises a new system for storing and distributing the ink, whichconstitutes the main feature of my invention.

An absorbing pad disposed between the two semi-cylinders or segments issaturated with printing ink and, as pressure is being applied to thehandle for printing, the inner form part of the stamp will press uponthe ink storage pad and the ink will be squeezed out through theperforations of the printing semi-cylinder and into the printing padarranged upon the latter from where it flows to the stencil.

This system of applying pressure for ink distribution permits the userto make an innumerable amount of copies with the ink uniformlydistributed on the paper,

while the ink or surplus ink will return to the storage ink pad, as willbe hereinafter further explained.

v the ink is forced in the same direction, the two ink pads 7 The innersegment of the two semi-cylinders, Whether in one piece or separate, areeach re-enforced by a bridge, which may also serve as a handle; or aseparate handle may be attached thereto; this re-enforcement will makethe inner segment of the stamp sturdy and firm contrary to the outersemi-cylinder which must be flexible and vibratory; thus the outerprinting semi-cylinder will have a hinge like springy movement due tothe squeezing of the storage pad, as pressure is applied to the handlewhen rolling the stamp over the paper.

Between the inner and outer segment is a space adapted to receive an inkstonge pad therebetween, while the printing pad is securely attached tothe outside of the perforated printing cylinder, and the ink will thuspass freely through it from one pad to the other.

When ink is circulated and distributed under pressure it provides acleaner stamp because it makes it unnecessary to apply so much ink so itwould flow freely by itself.

The pressure on the handle will hasten or slow the flow of ink as theuser controls the pressure and adjusts it accordingly; therefore, when astamp has been newly inked very little pressure is needed for printing,except to make larger quantities of copies, when a greater amount ofpressure would be required. However, all the copies would be uniformlyinked as the user slowly increases the pressure.

The stamp is used by rolling it towards or away from you, and only onceover the paper; as it is then lifted and returned to repeat theoperation. The stamp may be used to print on a regular memo pad or anyblock of paper,

. or even a book, but the best result would be obtained if the stamp isused together with a printing base as shown in connection with thisstamp.

This printing base has a right angular guide for the stamp and linesmarked to guide the paper and it will assist the user to print straightand will at the same time provide a flexible or electric cushion for thestamp.

If the printing base would be provided with a soft padding, such as forinstance rubber, it would facilitate making a print of high quality,similar to that of mimeographing machines, which are using a revolvingperforated drum against a rubber roller.

The printing cylinder is made of less width than the innersemi-cylinder.

The two pads are extending outside of the printing semi-cylinder inorder to prevent this cylinder from bruising the stencil, and thestencil extends outside of the pads to prevent any ink from getting ontothe paper on the sides, but it is about even with the inner stamp. Thetop of the stencil isnattached to prongs or screws on the inside of thestamp; the stencil is stretched tight over the printing cylinder and isfolded over the sharp edge of'the printing cylinder with a crease formedon said stencil so that it may fold over the said cylinder, further bothcorners are folded to make sure that the stencil will remain attached'.I i

L The two pads extend beyond and completely enclose the sides of theprinting semi-cylinder; this is an essential feature to prevent theprinting semi-cylinder from damaging the stencil.

As this stamp is always rolled in one direction and should end on thefinishing side of the stamp as soon as the actual printing has been donein order to produce a clean stamp.

The empty space next to the storage pad will receive the surplus inkfrom the printing pad and the open holes in the outer semi-cylinder willpermit the surplus ink to pass through said holes and into the openspace next to the storage pad, where it will flow into the storage padand be absorbed as the stamp is being used.

The idea is that the holes will relieve the printing pad from surplusink and permit it to return to the ink storage pad.

Whatever ink escapes will be absorbed by the absorbent strip formingpart of the stencil.

The stencil is also re-enforced at both ends.

In the drawing:

FIGURE 1 is a perspective view of a hand stamp.

FIGURE 2 is a bottom view of the same with parts broken off.

FIGURE 3 is a blank from which the stamp is made.

FIGURE 4 is a view similar to FIGURE 1.

FIGURES 5 and 6 are top plan views showing the respective parts of mydevice.

FIGURE 7 is a top plan view of a stencil.

FIGURE 8 is a top plan view of a printing base; while FIGURE 9 is across sectional view of same.

Referring more particularly to the drawings, the invention consists of aflat piece of material 20, half of which is made with perforations 21,as shown in FIG- URE 3. This piece of material is bent upon itself, asshown at 22 in FIGURE 1 to form two substantially semi-cylinders, theinner cylinder 26 and the outer or printing cylinder 27, adapted toreceive an ink storage pad 23 therebetween.

An ordinary mimeograph ink pad 24 is attached to the printingsemi-cylinder 27 to which also the actual stencil 25 is secured.

This construction thus comprises a new system for storing anddistributing the ink, and constitutes the main features of my invention.

The absorbing ink storage pad 23, arranged between the twosemi-cylinders, is saturated with printing ink and, as pressure is beingapplied to the handle 28 secured to the bridge 29 which is attached tothe inner firm part of the stamp 26, the latter will press upon the inkstorage pad and the ink will be squeezed out through the perforations 34of the printing cylinder 27 and into the printing pad 24 arranged uponthe latter from where it flows to the stencil. The said bridge may also,if desired be used as a handle.

It may be observed that the inner semi-cylinder, whether in one piece orseparate, is re-enforced by the bridge 29; this rte-enforcement willmake the inner semi-cylinder of the stamp sturdy and firm contrary tothe outer semicylinder, which itself is flexible and vibratory; thusthis outer printing semi-cylinder will due to the squeezing of the innerstorage pad have a hinge-like springy movement as pressure is applied tothe handle when rolling the stamp over the paper.

When the ink is circulated under pressure, it provides for a cleanerstamp, because it makes it unnecessary to apply so much ink as it wouldflow freely by itself.

The pressure on the handle will hasten or slow the flow of ink as theuser controls the pressure and adjusts it accordingly; therefore, when astamp has been newly inked, very little pressure is needed for printing,except to make larger quantities of copies, when a greater amount ofpressure would be required.

The stamp may be used to print on a regular memo pad, or any block ofpaper or even a book, but the best result would be obtained, if thestamp is used together with a printing base for guidance as shown inFIGURE 8. Thus this base has a right angular guide 30 for the stamp andmarked lines 31 to guide the paper and adjust it to various sizes, andit will assist the user to print straight and will at the same timeprovide a flexible or elastic cushion 32 for the stamp.

The regular mimeograph ink pad 24 is stretched tight over the outside ofthe printing cylinder and over the actual printing space and is attachedin any convenient manner.

The top of the stencil 25 is attached to the prongs or screws 4t} on theinside of the stamp by means of holes 41 in the stencil. The stencil isstretched tight over the printing cylinder and is folded over the sharpedge of the printing cylinder 27, and a crease is put into it tofacilitate said folding.

The two pads 23 and 24 shown in FIGURE 2 extend beyond and completelycover the ends of the printing semi-cylinder, as may be seen, in part,in FIGURE 3.

This is an essential feature to prevent the said printing cylinder fromdamaging the stencil which extends outside the pad; and preventing inkfrom scilingythe paper to be printed. As the stamp is always rolled inone direction and the ink is forced in the same direction, the two inkpads should terminate on the finishing side of the stamp as soon as theactual printing has been done in order to produce a clean stamp.

The empty space 33 next to the storage pad 23 and the open holes 34 inthe outer semi-cylinder will permit the surplus ink to pass through saidholes and into the open space 33 next to the storage pad 23, where itwill flow into the storage pad and be absorbed as the stamp is beingfurther used.

The idea is that the holes will relieve the printing pad from surplusink and permit it to return to the storage pad. Whatever ink escapeswill be absorbed by the absorbent strip 35 forming part of the stencil.

The stencil is also re-enforced at each end as at 25, 25 on that sidethat is in contact with the paper to be printed on in order to preventsmudging of said paper.

A modification of my device is shown in FIGURE 4, in which the stampdevice comprises two separate semicylinders 26"and 27' detachablysecured together by screws or prongs 40' formed on the printingcylinder, while a clasp 41 integral with the printing cylinder 27' isbent over the edge of the inner cylinder 26' which permits the printingcylinder to move freely and press upon the ink pad 23'.

I claim:

1. A band stamp made of a single piece of material bent upon itself toform an inner and an outer semicylindrieal member, the outer memberbeing a flexible moving printing cylinder formed with perforations andhaving one end thereof elongated, a handle attached to a bridge and thelatter secured to said inner member, an absorbing ink storage padarranged between the inner and outer member and forming an empty spaceat one of its ends, .a mimeograph ink pad secured to the outer rnemher,and a stencil arranged upon said mimeograph pad, prongs upon the innermember of the stamp, the stencil having one end mounted on said prongsand the other end stretched over one end of the outer member and foldedover a sharp edge of the latter, thereby securing the stenoil to theflexible moving printing cylinder; the ink storage pad being shorterthan the two semi-cylindrical members, leaving said empty spacetherebetween at the finishing side, whereby the surplus ink from themimeograph pad, when the latter is under pressure and having inked thestencil, will through the perforations in said outer semi-cylindermember return it into the ink storage pad to repeat its circulation;said pads covering the sides of the printing cylinder to prevent it fromdamaging the stencil, and said stencil being re-enforced at both ends,whereby to prevent the stencil from smudging the paper as the stamp isstarted and lifted off the paper.

2. In a hand stamp, as claimed in claim 1, and wherein the ink storagepad and the mimeograph ink pad extend beyond and completely cover thesides of the outer 5 member, whereby to prevent said outer member fromdamaging the stencil and soiling the paper.

3. In a hand stamp, as claimed in claim 1, and wherein the stencil beingre-en forced at each end on the side contasting the paper to be printed,whereby to prevent the color of the stencil from smudging the paper asthe stamp is started or lifted off the paper.

4. In a hand stamp, as claimed in claim 1, and wherein the stencil atthe finishing end is having a strip of paper, whereby to absorb escapingink.

References Cited in the tile of this patent UNITED STATES PATENTSHopwood Oct. 13,

Lindsay et al. Mar. 27,

Hidalgo Feb. 6,

Harts J an. 20,

Sto-elting Mar. 26,

FOREIGN PATENTS Fnance Oct. 1,

1. A HAND STAMP MADE OF A SINGLE PIECE OF MATERIAL BENT UPON ITSELF TOFORM AN INNER AND AN OUTER SEMICYLINDRICAL MEMBER, THE OUTER MEMBERBEING A FLEXIBLE MOVING PRINTING CYLINDER FORMED WITH PERFORATIONS ANDHAVING ONE END THEREOF ELONGATED, A HANDLE ATTACHED TO A BRIDGE AND THELATTER SECURED TO SAID INNER MEMBER, AN ABSORBING INK STORAGE PADARRANGED BETWEEN THE INNER AND OUTER MEMBER AND FORMING AN EMPTY SPACEAT ONE OF ITS ENDS, A MIMEOGRAPH INK PAD SECURED TO THE OUTER MEMBER,AND A STENCIL ARRANGED UPON SAID MIMEOGRAPH PAD, PRONGS UPON THE INNERMEMBER OF THE STAMP, THE STENCIL HAVING ONE END MOUNTED ON SAID PRONGSAND THE OTHER END STRETCHED OVER ONE END OF THE OUTER MEMBER AND FOLDEDOVER A SHARP EDGE OF THE LATTER, THEREBY SECURING THE STEN-